KDE Plasma Desktop has digital sticky notes, and in many ways they're even more useful than the physical ones. The application is called KNotes, and if you have random ideas that you feel like jotting down, it's probably something you want to consider for your own Linux desktop.
Sticky Notes are great for keeping game shortcuts, often used Linux commands, etc quickly accessible. I also have notes for tips on using Canva, Kdenlive, Amateur Radio protocols and callsigns, and more. They're on hand to quickly expand the notes as needed.
You can choose different colours and set alarms for them. The whole Kontact suite is actually interesting to explore. If you want something a bit more advanced, I use GloboNotes, but that requires Java to run. Of course, Java based apps though also will run on Windows and other OSes where Java can run.
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I remember the first time I went to an "un" conference. It was a chaotic event at first, with lots of socializing and sharing of personal projects, but it gradually coalesced into a mostly self-organized technical event. It didn't happen with magic, but with sticky notes. People wrote ideas for talks and presentations on those colorful adhesive notepads, and stuck them to a common wall, and other people grouped similar ideas into clusters, and eventually everyone knew where to congregate to discuss specific topics.
